"My review set has a bit of cloudiness in some areas, and just doesn't have the same clarity I've come to expect."
That's exactly my feel with my pair, the fit is good (with my right ear canal being less twisty the plugging it in and removal are less of a problem and the sealing is very slightly better on the left side, but still good, only can hear the difference when playing no music and in really loud areas like busy streetside in Hong Kong)
The cosmetic is just merely acceptable, one very slightly bulge up air bubble in one ear piece where you can feel be touching with finger but not wearing, and both piece near the opening of sound tube have some cloudy area where the 3D printing thin lines are noticeable when shine with light, and on one ear at the face plate edge I can see the finger nail or holding clamp indentation with shining light or feel it when I hold the side to remove the earpiece.
But overall these are all cosmetic only defects in a market spoiled by some brands (hell my friend's QDC 5CH looks perfect even with shining torch). Regarding the sound it's as your conclusion it's unbeatable to my ears especially at the price point.
One regret was I got the UERR with the old connector while a new connector is out, it's not a matter for using the UERR, but as I owned a Sony ZX300 which I would want a 4.4mm balanced cable which is not available with UE right now, and I bet if they will release in the future it won't be in the pre 2017 connector. And I don't want to use aftermarket cables as they always induce some sonic changes to my ears, this is in my book counter-intuitive as I purchase the UERR for it's reference tuning (at least to the capitol guys) where getting a cable which would alter the sound seems not a good idea to me